Hello I am Sky. I am struggling with implementation of a ADC oversampling issue in TM4C123. When I am following a document named "ADC Oversampling Techniques for Stellaris® Family Microcontrollers" (spma001a.pdf), I should add code on two parts: 1) setting part, 2) data acquisition part 1) In setting // // Initialize the ADC to oversample channel 1 by 8x using sequencer 0. // Sequencer will be triggered by one of the general-purpose timers. // ADCSequenceConfigure(ADC_BASE, 0, ADC_TRIGGER_TIMER, 0); ADCSoftwareOversampleConfigure(ADC_BASE, 0, 8); ADCSoftwareOversampleStepConfigure(ADC_BASE, 0, 0, (ADC_CTL_CH1 \ | ADC_CTL_IE | ADC_CTL_END)); 2) In data acqusition part, // // Clear the ADC interrupt // ADCIntClear(ADC_BASE, 0); // // Get averaged data from the ADC // lStatus = ADCSoftwareOversampleDataGet(ADC_BASE, 0,&g_ulAverage); Then, here is my problem. When I refer to the datasheet of TM4C123GH6PM ( tm4c123gh6pm .pdf), ADCSAC register represents a status of oversampling setting. I guess that it should return 0x3 as I set 8x oversampling, but it returns always 0 as belows: ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_TIMER, 0); ADCSoftwareOversampleConfigure(ADC0_BASE, 0, 8); ADCSoftwareOversampleStepConfigure(ADC0_BASE, 0, 0, (ADC_CTL_CH1 | ADC_CTL_IE | ADC_CTL_END)); uint32_t val = HWREG(ADC0_BASE + ADC_O_SAC); //it returns 0!!!!! Is there any additional settings to use ADC oversampling? Please answer my question. Thanks in advance. + Additionally. my desired specification is 1) Read two ADC channel concurrently (ADC0, ADC1) 2) 1Mhz sampling rate / 8 samples = 125khz sampling rate -Sky
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